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High-velocity ice impact damage quantification in composite laminates using a frequency domain-based correlation approach

机译：使用基于频域的相关方法的复合层压板中的高速冰冲击量化

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摘要

This paper investigates the feasibility of using a novel domain-based correlation approach derived from the complex frequency domain assurance criterion (CFDAC) for the detection and quantification of impact damage in composite laminates. The CFDAC is essentially a complex-valued two-dimensional indicator of the covariance between two sets of frequency response functions for each pair of spectral lines corresponding to vibration-response of pristine and damage states. The study focuses on damage induced by high-velocity ice impacts on carbon fiber laminated plates. The experimental results demonstrate that the proposed methodology correctly identifies the level of induced damage via a user-independent scalar damage indicator. Therefore, this approach has potential use as a damage indicator, which could be adapted as a structural assessment nondestructive method. This research aims to contribute to the further development of functional, autonomous, and reliable structural health monitoring systems for composite structures based on spectral-domain indices.
机译：本文研究了使用从复合频域保证标准（CFDAC）的新型结构域的相关方法进行了可行性，以检测和定量复合层压板中的冲击损伤。 CFDAC基本上是两组频率响应函数的协方差的复值二维指标，用于对应于原始和损坏状态的振动响应的每对频谱线。该研究侧重于高速冰冲击对碳纤维层压板的损伤。实验结果表明，所提出的方法通过用户独立的标量损坏指示符正确地识别诱导损坏水平。因此，这种方法具有潜在用作损坏指示器，其可以适应结构评估非破坏性方法。本研究旨在基于谱域指数的复合结构的功能，自主和可靠结构健康监测系统进一步发展。

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